What was found
PDIS 587 73-22 7630 15MAR19 MEM OPEN U LOGPAGES:3028560 ON TAKEOFF JUST AFTER DEPARTING THE RUNWAY THE RED ENGINE FAIL LIGHT ILLUMINATED. A FEW SECONDS LATER AN ODD BOOMING NOISE WAS HEARD FOR ABOUT THREE SECONDS. THERE WERE NO ABNORMALITIES SHOWN ON ANY OF THE ENGINE GAUGES. FACT 15MAR19 19:44 MEM UNABLE TO ACCESS ECU1A THROUGH MCDU. FADEC GROUND TEST ALSO FAILS ECU1. ECU1B SHOWS FAULT CODE: LABEL 160-28. REMOVED AND REPLACED NR 1 ENG ECU IAW MM 73-21-02-4-1. ALL RTS TEST PASS. PERFORMED HIGH POWER ENGINE RUNS PER JRH. ALL PARAMETERS NORMAL/ NO FAULTS.